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Fix POSIX compliance of increase_default_stack_size.sh

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It turns out `\xXX` is not part of POSIX. The Octal `\ddd` is however, and is
used here.
This commit is contained in:
Luke Parker
2025-12-08 22:47:10 -05:00
parent 34dbfedc5a
commit 48a3cf5027
1 changed files with 7 additions and 2 deletions
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9
orchestration/increase_default_stack_size.sh
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@@ -26,6 +26,9 @@ hex() {
read_bytes() {
dd bs=1 skip="$1" count="$2" if="$ELF" 2> /dev/null | hex
}
hex_to_octal() {
printf "ibase=16; obase=8; %s\n" "$1" | bc
}
write_bytes() {
POS=$1
BYTES=$2
@@ -34,15 +37,17 @@ write_bytes() {
# Advance to the third byte, as in, after the first two bytes
BYTES=$(printf "%s" "$BYTES" | tail -c+3)
NEXT=$(hex_to_octal "$NEXT")
# shellcheck disable=SC2059
printf "\x$NEXT" | dd conv=notrunc bs=1 seek="$POS" of="$ELF" 2> /dev/null
printf \\"$NEXT" | dd conv=notrunc bs=1 seek="$POS" of="$ELF" 2> /dev/null
POS=$((POS + 1))
done
}
# Magic
MAGIC=$(read_bytes 0 4)
EXPECTED_MAGIC=$(printf "\x7ELF" | hex)
# shellcheck disable=SC2059
EXPECTED_MAGIC=$(printf \\"$(hex_to_octal 7F)"ELF | hex)
if [ ! "$MAGIC" = "$EXPECTED_MAGIC" ]; then
echo "Not ELF"
exit 2